MacRumors has collected a few interesting quotes from people in the know about iOS 7. John Gruber: "What I've heard: iOS 7 is running behind, and engineers have been pulled from OS X 10.9 to work on it." It's going to be a "significant system-wide UI overhaul". It will apparently make people who love rich textures "sad". I honestly can't wait - I wonder what Apple's designers've got cooking for us.

I always find it stupid that people whine about "bling" in a UI, OSD, etc. There's absolutely nothing wrong with "eye candy" as long as the functionality isn't compromised and the hardware can keep up. I suppose when people don't have anything of any true substance to complain about, they go after the first thing they see.

I guess it's a matter of personal aesthetics (or whatever it's called) - I for one like simple lines and shapes with plain colours; others tend to like detailed buttons with magnificent textures. As simple as that

It's not only a function of plain attractiveness: it's also a function of presenting whatever the content is in an understandable form and a function of intuitiveness and clarity of UI - behaviour. Of course there is no such a thing as a single, always-optimal way of doing things, but in a good UI these all things are taken into account instead of just focusing on or the other.